package com.atguigu.web;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public abstract class BaseServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    /**
     * 通过反射  得到  需要执行的servlet程序
     *
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("UTF-8");
        resp.setContentType("text/html; charset=UTF-8");
        String action=req.getParameter("action");
        try {
            Method declaredMethod = this.getClass().getDeclaredMethod(action,HttpServletRequest.class,HttpServletResponse.class);
//            declaredMethod.setAccessible(true);
            Object invoke = declaredMethod.invoke(this,req,resp);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
       /* String action = req.getParameter("action");
        try {
            Method declaredMethod = this.class.getDeclaredMethod(action, HttpServletRequest.class, HttpServletResponse.class);
            Object invoke = declaredMethod.invoke(this, req, resp);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }*/
    }

}
